The OID for DistinguishedNameMatch is 2.5.13.1 for the LDAPSyntaxes of 1.3.6.1.4.1.1466.115.121.1.12 (DN)
The rule evaluates to TRUE if and only if all of these evaluate to TRUE:
If one or more of the Attribute Value Assertion comparisons evaluate to Undefined and the remaining Attribute Value Assertion comparisons return True then the DistinguishedNameMatch rule evaluates to Undefined.
The LDAP definition for the DistinguishedNameMatch rule is defined in RFC 4517
( 2.5.13.1 NAME 'distinguishedNameMatch' SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 )